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128 Chapter 17: Rendering
• Matte: Renders a matte mask, based on selected
objects, material effects channel (effect IDs),
or G-Buffer IDs.
The Matte element displays an additional
Matte
Texture Element rollout (page 3–137)
.
•
Object I D: Retains the object ID
information assigned to the object. Similarly
to the material ID, the object ID information
is useful for selecting objects based on ID in
another image processing or specia l effects
application. If you know that you will want to
select several objects at once, at a later time,
you can assign them all the same object ID
in 3ds Max. By rendering with the object ID,
this inform ation will be available in other
applications. You an assign the object ID in
the
Object Prop erties Dialog (page 1–111) .
Any g iven object ID w i ll always be represented
bythesamecolor.Thecorrelationbetweena
specific mat erial ID and a specific color is the
same in Combustion.
• Pa int: The Paint component (surfaces) of Ink
’n Paint materials.
• Reflection: Thereflectionsintherendering.
• Refraction: Therefractionsintherendering.
• Self-Illumination: The self-illumination
component of the rendering.
• Shadow: The shadows in the rendering. This
element saves black-and-white shadows only.
See
Compositing Rendered Elements (page
3–129)
.
Note: The mental ray renderer does not include
shadows created by
global i llumination (page
3–104)
and final gathering (page 3–109) in the
Shadow render element output.
• Specular: The specular component of the
rendering.
•
Ve l o c i t y : The motion info rmation which
canbeusedinotherapplicationsforthings
such as creating motion blur or retiming an
animation.
The Velocity element displays an additional
Velocity Element Parameters rollout (page
3–137)
.
• ZDepth:A grayscale representation of the
Z depth, or depth within the view, of objects
within the scene. The nearest objects appear
in white, and the depth of the scene in black.
Intermediate objects are in gray, the darker the
deeper the object is, w ithin the view.
The Z Depth element displays an additional
Z
Element Parameters rollout (p age 3–139)
.
When you render one or more elements, a normal
complete rendering is also generated. In fact, the
element renderings are generated during the same
renderingpass,sorenderingelementscostslittle
extra render time.
Renderingtoelementsisavailableonlywhenyou
do production rendering with the default
scanline
renderer (page 3–37)
or the mental ray renderer
(page 3–77)
.
Note: The default scanline renderer supports a
maximum of 32 render elements per scene. The
mental ray renderer does not limit the number
of render elements. If you’re using a third-party
renderer , check the product documentation for a
possible limit on the number of render elements.
Note: When using the default scanline renderer,
Antialiasing (page 3–39) must be on in order to
render elements. Wit h Antialiasing off, rendering
elements is disabled.
El ement File Names
Ifyouhavepreviouslyassignedafilenameand
path for t he (complete) rendering on the Render
Dialog’s
Common Parameters rollout (page 3–27) ,
the render elements feature uses this name and
path as the basis for names of the various elements.